<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    .box1 {
      background-color: aquamarine;
      margin-top: 30px;
    }
    .box1---1 {
      margin-top: 10px;
    }
    .box1---2 {
      margin-top: 50px;
      background-color: skyblue;
    }
    .box2 {
      background-color: plum;
      margin: 20px;
    }
    .box3 {
      background-color: orange;
    }
  </style>
</head>
<body>
  
  <div class="box1">


    <div class="box1---1">
     
        <div class="box1---2">box1-22</div>
    
    </div>
  </div>
  <div class="box2"></div>
  <div class="box3">
    box3
  </div>
</body>
</html>